Well-boring tool.



A. G. COLLINS.

WELL BORING TOOL.

APPLICATION FILED NOV.15, 1011,

1,065,294, Patented June 17, 1913.

WITNESSL'S" INVENTOR V W Meg TTORNE) veyance of the mass through the pipe to be and below the top of the grooved portion of discharged. 1; the drill and contacting the periphery of the 15 at What- I claim as my invention, islatter, said threaded and smooth shank hav- In a well boring tool, the combination g ing a longitudinal key groove extending 5 with an 'internally-threaded hollow tool l their entire lengths and a key seated within stock, of awlrill provided in its periphery 1 said groove of the smooth shank adapted for with spirabgrooves and having a terminal securing the reamer against independent ro- 20 threaded and an intermediate smooih shank i tation with respect to said drill v porfionpa reamer having a collar 0 reater T 10 diameter than the drill, said reamer being ASA \p r0viled with a key-Way and seated about the smpothrportion of the drill shank, a cutterairm extending laterally from the collar VVit-nesses E. PETERSON, 4 Home BARNES. 

